Here are reproduced the Introduction and the Scope:
In order to ensure correctness and consistency of the specifications (i.e., technical specifications and technical reports) under responsibility of the Technical Specification Groups (TSG) of the 3rd Generation Partnership Project (3GPP), clear, manageable and efficient mechanisms are necessary to handle version control, change control, document updating, distribution and management.
Also, the fact that the specifications are/will be implemented by industry almost in parallel with the writing of them requires strict and fast procedures for handling of changes to the specifications.
It is very important that the changes that are brought into the standard, from the past, at present and in the future, are well documented and controlled, so that technical consistency and backwards tracing are ensured.
The 3GPP TSGs, and their sub-groups together with the Support Team are responsible for the technical content and consistency of the specifications whilst the Support Team alone is responsible for the proper management of the entire documentation, including specifications, meeting documents, administrative information and information exchange with other bodies.
This document outlines the working methods to be used by the 3GPP Technical Specification Groups and their Working
Groups and their Sub-Groups, and by the 3GPP Support Team in relation to document management, i.e. handling of
specifications, updating procedures, Change Request procedures, version control mechanisms, specifications status
information etc. It complements the rules and procedures defined for 3GPP. This document does not stipulate the details
of the internal working of the TSG Sub-Groups. From the Technical Specification Group point of view, a task and
responsibility is given to a Working Group directly answering to the Technical Specification Group. In practice, the
work/task may be carried out in a subgroup of that Working Group.
full Table of Contents for TR 21.900 Word version: 16.2.0